List Analyzes – V
Vitamin B12 (cyanocobalamin) is necessary for the normal maturation of red blood cells. It performs the function of coenzyme in the synthesis of nucleic acids (DNA and RNA) and methionine from homocysteine. Methionine is necessary for the conversion of folic acid into folinic, which provides the normoblastic type of hematopoiesis.
Vitamin A refers to fat-soluble and exists in two forms - actually vitamin A, or retinol (found only in animal products), and provitamin A, known as carotene (derived from animal and vegetable products) that can be converted into retinol in the walls the digestive tract.
IgM antibodies to mumps virus appear in the acute period of infection (on the second day of the disease they are detected in 70% of patients, by the 5th day - at 100%) and persist up to 2 years (in 50% of patients - more than 5 months). Detection of IgM antibodies in the serum or an increase in IgG antibody titer in paired sera more than 4 times (sensitivity 88%) indicates a current infection.
When using the RSK, antibodies to the varicella-zoster virus in the serum are detected on the 7th-10th day after the appearance of the rash, their amount reaches a peak by the 2-3rd week. In favor of an acute infection, a 4-fold increase in antibody titer (a sensitivity of 50%) is indicated.
Normally, only about 1% of the total number of catecholamines released during the day by the adrenal glands is excreted unchanged in the urine (adrenaline 0.36-1.65%, norepinephrine 1.5-3.3%), while in the form of vanillylmandelic acid - up to 75%. From the clinical point of view, the determination of vanillylmandelic acid in the urine especially helps in the diagnosis of pheochromocytoma and neuroblastoma.